You may find some of these links useful for further research.
All About Hubs – an extensive tour de force on this website all about hub gears.
Bibliotheque Gallica – this French website is a fantastic resource.
Bike Cult Tracks and Velodromes – list of bicycle tracks and velodromes from past to present.
British Newspaper Archive – search hundreds of historic newspapers.
Brooks saddles – the official website.
Chainwheel tattoo project – an interesting site for silhouettes of vintage chainwheels.
Chateau de Bosc – veteran cycle museum with very early and unusual examples.
Classic Lightweights – a comprehensive site on the history of British bespoke bicycle and component manufacture.
Classic Rendezvous – dedicated to Lightweight Vintage Bicycles c.1900~1983.
Cross frames – an interesting Dutch site on the history and variety of cross frames.
Cyclo – video on removing and rebuilding a 1930s Cyclo 3-speed freewheel
Disraeli Gears – a derailleur collection from before 1900.
Dursley Pedersen cycles – a delightful site well worth visiting.
Espacenet – patent search from c.1890.
Fahrradsammler – mainly German veteran cycles.
Grace’s Guide – a substantial archive of British industrial history.
Internet Archive – a substantial digital repository of documents the link takes you to velocipedes.
National Cycle Archive – cycling history sources.
National Cycle Museum – home to over 260 cycles.
Online Bicycle Museum – an extensive site with excellent research material and images.
Registered Designs – helpful in dating registered design numbers.
Sheldon Brown – extensive resource on all sorts of cycling information.
Shuttleworth – the cycle collection including a rare lever-drive boneshaker.
Sterba Bicycle Museum – stunning veteran cycle website.
Sturmey-Archer – the official website.
Sturmey-Archer – How to repair old Sturmey-Archer hubs.
Terrot Club de France – everything Terrot including catalogues.
Tonton Velo (Uncle Bike Forum) – French website for all things old bicycle.
Velobase – vintage cycling database.
Velorama – the Dutch national cycle museum.
Viking – Classic Viking Cycles – an extensive site.
Winged Wheels – about the Cyclists’ Touring Club.